Novajoin should always use the FQDN when running ipa-client-install. This is needed to allow the DNS domain of the OSP deployment to differ from the IdM realm.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHEA-2019:2811